linux-kernel - Re: [RESEND PATCH v2] ASoC: rockchip: Add machine driver for MAX98357A/RT5514/DA7219

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Message-ID: <20160525173246.GA5125@rob-hp-laptop>
Date:	Wed, 25 May 2016 12:32:46 -0500
From:	Rob Herring <robh@...nel.org>
To:	Xing Zheng <zhengxing@...k-chips.com>
Cc:	linux-rockchip@...ts.infradead.org, dianders@...omium.org,
	heiko@...ech.de, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	alsa-devel@...a-project.org
Subject: Re: [RESEND PATCH v2] ASoC: rockchip: Add machine driver for
 MAX98357A/RT5514/DA7219

On Tue, May 24, 2016 at 09:36:14AM +0800, Xing Zheng wrote:
> There are multi codec devices on the RK3399 platform, we can use
> this patch support and control these codecs.
> 
> Signed-off-by: Xing Zheng <zhengxing@...k-chips.com>
> ---
> 
> Changes in v2:
> - use the FS 256 to set mclks of the max98357a and rt5514 danamically
> - add more sample rate for da7219
> 
>  .../sound/rockchip-max98357a-rt5514-da7219.txt     |   15 +
>  sound/soc/rockchip/Kconfig                         |   11 +
>  sound/soc/rockchip/Makefile                        |    2 +
>  .../rockchip/rockchip_max98357a_rt5514_da7219.c    |  333 ++++++++++++++++++++
>  4 files changed, 361 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/rockchip-max98357a-rt5514-da7219.txt
>  create mode 100644 sound/soc/rockchip/rockchip_max98357a_rt5514_da7219.c
> 
> diff --git a/Documentation/devicetree/bindings/sound/rockchip-max98357a-rt5514-da7219.txt b/Documentation/devicetree/bindings/sound/rockchip-max98357a-rt5514-da7219.txt
> new file mode 100644
> index 0000000..5928384
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/rockchip-max98357a-rt5514-da7219.txt
> @@ -0,0 +1,15 @@
> +ROCKCHIP with MAX98357A/RT5514/DA7219 codecs
> +
> +Required properties:
> +- compatible: "rockchip,rockchip-sound"

This is generic, but the binding seems to be very specific to only 3 
specific codecs. Listing all 3 codecs seems a bit strange. Perhaps a 
name related to the board name would be better.

> +- rockchip,cpu: The phandle of the Rockchip I2S controller that's
> +  connected to the codecs

What's the size? always 3?

> +- rockchip,codec: The phandle of the MAX98357A/RT5514/DA7219 codecs

Please make the size and ordering clear.

> +
> +Example:
> +
> +sound {
> +	compatible = "rockchip,rockchip-sound";
> +	rockchip,cpu = <&i2s0 &i2s0 &i2s1>;
> +	rockchip,codec = <&max98357a &headsetcodec &codec>;
> +};